Two semi-automatic rifles, six sub-machine guns and 113 pistols may have found their way into the criminal underground, police fear.
Two pistols were found after police last week arrested a man who allegedly shot at officers in West Auckland.
Waikato police organised an amnesty for the guns to
be handed in but police spokesman Andrew McAlley said so far no guns had been handed in and the amnesty has now ended.
The Beretta and Glock pistols found with the gunman were part of the collection of over 120 guns illegally sold by a Coromandel collector, alleges Waikato police.
Police spokesman Andrew McAlley said the collector - who is now the subject of an investigation - had told police that the guns had been stolen from his house.
Mr McAlley said in a separate investigation, Operation Daisy, two homemade claymore mines were found along with 1000 other guns including rocket launchers.
The claymore mines - containing 400 ball bearings - could be remotely set off . "They are a giant shotgun," Mr McAlley said.
According to a BBC report, Claymore mines are deadly to people within 50 metres and can be dangerous to people up to 250 metres from the explosion.
Mr McAlley said two army grenades have also been located and are the subject of an investigation by police and the Ministry of Defence.
Meanwhile Detective Senior Sergeant Greg Nicholls of Waikato CIB said three more guns from the Coromandel collection had since been found in "criminals hands".
Mr Nicholls said the police have fears that the rest of the missing guns from the Coromandel collection could end up on the black market.
He said although the amnesty has expired, police would consider extending it on a case by case basis.
